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답안 #580104

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
580104 2022-06-20T15:19:36 Z wiwiho Boarding Passes (BOI22_passes) C++14
100 / 100
 194 ms 13388 KB 
#include <bits/stdc++.h>

#define iter(a) a.begin(), a.end()
#define lsort(a) sort(iter(a))
#define gsort(a) sort(iter(a), greater<>())
#define eb emplace_back
#define ef emplace_front
#define pob pop_back()
#define pof pop_front()
#define mp make_pair
#define F first
#define S second
#define uni(a) a.resize(unique(iter(a)) - a.begin())
#define printv(a, b) { \
    for(auto pv : a) b << pv << " "; \
    b << "\n"; \
}

using namespace std;

typedef long long ll;
using pii = pair<int, int>;
using pll = pair<ll, ll>;

template<typename A, typename B>
ostream& operator<<(ostream& o, pair<A, B> p){
    return o << '(' << p.F << ',' << p.S << ')';
}

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);

    string s;
    cin >> s;
    int n = s.size();
    const int G = 15;

    vector<vector<int>> pos(G, vector<int>(1));
    vector<int> id(n);
    for(int i = 0; i < n; i++){
        id[i] = pos[s[i] - 'A'].size();
        pos[s[i] - 'A'].eb(i);
    }
    
    vector<vector<vector<ll>>> f(G, vector<vector<ll>>(G));
    for(int a = 0; a < G; a++){
        for(int b = 0; b < G; b++){
            f[a][b].resize(pos[a].size() + 1);

            ll total = 0;
            ll cnt = 0;
            for(int i = 0; i < n; i++){
                if(s[i] == 'A' + a){
                    total += cnt;
                    f[a][b][id[i]] += total;
                }
                if(s[i] == 'A' + b) cnt++;
            }

            total = 0;
            cnt = 0;
            for(int i = n - 1; i >= 0; i--){
                if(s[i] == 'A' + a){
                    f[a][b][id[i]] += total;
                    total += cnt;
                }
                if(s[i] == 'A' + b) cnt++;
            }
            f[a][b][0] = total;
        }
    }

    auto fmsk = [&](int a, int msk, int i){
        ll ans = 0;
        for(int j = 0; j < G; j++){
            if(1 << j & msk) ans += f[a][j][i];
        }
        return 2 * ans + f[a][a][i];
    };

    auto best = [&](int a, int msk){
        int l = 0, r = pos[a].size(); r--;
        while(l < r){
            int mid = (l + r) / 2;
            if(fmsk(a, msk, mid) >= fmsk(a, msk, mid + 1)) l = mid + 1;
            else r = mid;
        }
        //cerr << "best " << a << " " << bitset<G>(msk) << " : " << l << " " << fmsk(a, msk, l) << "\n";
        return l;
    };

    vector<ll> dp(1 << G, 1LL << 60);
    dp[0] = 0;
    for(int msk = 0; msk < (1 << G); msk++){
        //cerr << "dp " << bitset<G>(msk) << " : " << dp[msk] << "\n";
        for(int a = 0; a < G; a++){
            if(1 << a & msk) continue;
            int nxt = msk | (1 << a);
            int b = best(a, msk);
            ll t = dp[msk] + fmsk(a, msk, b);
            dp[nxt] = min(dp[nxt], t);
            //cerr << "trans " << bitset<G>(msk) << " -> " << bitset<G>(nxt) << " " << t << "\n";
        }
    }

    ll ans = dp[(1 << G) - 1];
    if(ans % 2 == 0) cout << ans / 2 << "\n";
    else cout << ans / 2 << ".5\n";
    
    return 0;
}

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 24 ms 596 KB Output is correct
2 Correct 15 ms 596 KB Output is correct
3 Correct 17 ms 596 KB Output is correct
4 Correct 16 ms 596 KB Output is correct
5 Correct 24 ms 724 KB Output is correct
6 Correct 68 ms 10524 KB Output is correct
7 Correct 77 ms 12584 KB Output is correct
8 Correct 77 ms 13244 KB Output is correct
9 Correct 83 ms 13352 KB Output is correct

Subtask #2
25.0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 22 ms 596 KB Output is correct
2 Correct 21 ms 596 KB Output is correct
3 Correct 44 ms 596 KB Output is correct
4 Correct 39 ms 596 KB Output is correct
5 Correct 30 ms 596 KB Output is correct
6 Correct 26 ms 596 KB Output is correct
7 Correct 36 ms 596 KB Output is correct
8 Correct 36 ms 596 KB Output is correct
9 Correct 35 ms 596 KB Output is correct
10 Correct 31 ms 596 KB Output is correct
11 Correct 32 ms 596 KB Output is correct
12 Correct 33 ms 596 KB Output is correct
13 Correct 33 ms 596 KB Output is correct
14 Correct 32 ms 596 KB Output is correct
15 Correct 32 ms 596 KB Output is correct
16 Correct 34 ms 596 KB Output is correct
17 Correct 33 ms 596 KB Output is correct

Subtask #3
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 22 ms 596 KB Output is correct
2 Correct 21 ms 596 KB Output is correct
3 Correct 44 ms 596 KB Output is correct
4 Correct 39 ms 596 KB Output is correct
5 Correct 30 ms 596 KB Output is correct
6 Correct 26 ms 596 KB Output is correct
7 Correct 36 ms 596 KB Output is correct
8 Correct 36 ms 596 KB Output is correct
9 Correct 35 ms 596 KB Output is correct
10 Correct 31 ms 596 KB Output is correct
11 Correct 32 ms 596 KB Output is correct
12 Correct 33 ms 596 KB Output is correct
13 Correct 33 ms 596 KB Output is correct
14 Correct 32 ms 596 KB Output is correct
15 Correct 32 ms 596 KB Output is correct
16 Correct 34 ms 596 KB Output is correct
17 Correct 33 ms 596 KB Output is correct
18 Correct 22 ms 596 KB Output is correct
19 Correct 21 ms 596 KB Output is correct
20 Correct 41 ms 596 KB Output is correct
21 Correct 44 ms 596 KB Output is correct
22 Correct 28 ms 596 KB Output is correct
23 Correct 26 ms 596 KB Output is correct
24 Correct 36 ms 596 KB Output is correct
25 Correct 33 ms 596 KB Output is correct
26 Correct 34 ms 596 KB Output is correct
27 Correct 31 ms 596 KB Output is correct
28 Correct 30 ms 596 KB Output is correct
29 Correct 32 ms 596 KB Output is correct
30 Correct 32 ms 596 KB Output is correct
31 Correct 33 ms 468 KB Output is correct
32 Correct 32 ms 596 KB Output is correct
33 Correct 32 ms 596 KB Output is correct
34 Correct 33 ms 596 KB Output is correct
35 Correct 31 ms 1876 KB Output is correct
36 Correct 31 ms 1876 KB Output is correct
37 Correct 83 ms 1800 KB Output is correct
38 Correct 80 ms 1748 KB Output is correct
39 Correct 40 ms 1876 KB Output is correct
40 Correct 79 ms 1876 KB Output is correct
41 Correct 84 ms 1876 KB Output is correct
42 Correct 84 ms 1776 KB Output is correct
43 Correct 80 ms 1876 KB Output is correct
44 Correct 83 ms 1748 KB Output is correct
45 Correct 84 ms 1876 KB Output is correct
46 Correct 81 ms 1876 KB Output is correct

Subtask #4
40.0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 24 ms 596 KB Output is correct
2 Correct 15 ms 596 KB Output is correct
3 Correct 17 ms 596 KB Output is correct
4 Correct 16 ms 596 KB Output is correct
5 Correct 24 ms 724 KB Output is correct
6 Correct 68 ms 10524 KB Output is correct
7 Correct 77 ms 12584 KB Output is correct
8 Correct 77 ms 13244 KB Output is correct
9 Correct 83 ms 13352 KB Output is correct
10 Correct 22 ms 596 KB Output is correct
11 Correct 21 ms 596 KB Output is correct
12 Correct 44 ms 596 KB Output is correct
13 Correct 39 ms 596 KB Output is correct
14 Correct 30 ms 596 KB Output is correct
15 Correct 26 ms 596 KB Output is correct
16 Correct 36 ms 596 KB Output is correct
17 Correct 36 ms 596 KB Output is correct
18 Correct 35 ms 596 KB Output is correct
19 Correct 31 ms 596 KB Output is correct
20 Correct 32 ms 596 KB Output is correct
21 Correct 33 ms 596 KB Output is correct
22 Correct 33 ms 596 KB Output is correct
23 Correct 32 ms 596 KB Output is correct
24 Correct 32 ms 596 KB Output is correct
25 Correct 34 ms 596 KB Output is correct
26 Correct 33 ms 596 KB Output is correct
27 Correct 22 ms 596 KB Output is correct
28 Correct 21 ms 596 KB Output is correct
29 Correct 41 ms 596 KB Output is correct
30 Correct 44 ms 596 KB Output is correct
31 Correct 28 ms 596 KB Output is correct
32 Correct 26 ms 596 KB Output is correct
33 Correct 36 ms 596 KB Output is correct
34 Correct 33 ms 596 KB Output is correct
35 Correct 34 ms 596 KB Output is correct
36 Correct 31 ms 596 KB Output is correct
37 Correct 30 ms 596 KB Output is correct
38 Correct 32 ms 596 KB Output is correct
39 Correct 32 ms 596 KB Output is correct
40 Correct 33 ms 468 KB Output is correct
41 Correct 32 ms 596 KB Output is correct
42 Correct 32 ms 596 KB Output is correct
43 Correct 33 ms 596 KB Output is correct
44 Correct 31 ms 1876 KB Output is correct
45 Correct 31 ms 1876 KB Output is correct
46 Correct 83 ms 1800 KB Output is correct
47 Correct 80 ms 1748 KB Output is correct
48 Correct 40 ms 1876 KB Output is correct
49 Correct 79 ms 1876 KB Output is correct
50 Correct 84 ms 1876 KB Output is correct
51 Correct 84 ms 1776 KB Output is correct
52 Correct 80 ms 1876 KB Output is correct
53 Correct 83 ms 1748 KB Output is correct
54 Correct 84 ms 1876 KB Output is correct
55 Correct 81 ms 1876 KB Output is correct
56 Correct 28 ms 596 KB Output is correct
57 Correct 43 ms 596 KB Output is correct
58 Correct 23 ms 596 KB Output is correct
59 Correct 15 ms 596 KB Output is correct
60 Correct 17 ms 596 KB Output is correct
61 Correct 18 ms 596 KB Output is correct
62 Correct 23 ms 724 KB Output is correct
63 Correct 69 ms 10528 KB Output is correct
64 Correct 77 ms 12588 KB Output is correct
65 Correct 79 ms 13304 KB Output is correct
66 Correct 82 ms 13232 KB Output is correct
67 Correct 20 ms 596 KB Output is correct
68 Correct 21 ms 596 KB Output is correct
69 Correct 40 ms 596 KB Output is correct
70 Correct 37 ms 596 KB Output is correct
71 Correct 30 ms 596 KB Output is correct
72 Correct 26 ms 596 KB Output is correct
73 Correct 35 ms 596 KB Output is correct
74 Correct 32 ms 596 KB Output is correct
75 Correct 33 ms 596 KB Output is correct
76 Correct 31 ms 596 KB Output is correct
77 Correct 32 ms 596 KB Output is correct
78 Correct 32 ms 596 KB Output is correct
79 Correct 34 ms 596 KB Output is correct
80 Correct 33 ms 596 KB Output is correct
81 Correct 34 ms 596 KB Output is correct
82 Correct 32 ms 596 KB Output is correct
83 Correct 33 ms 596 KB Output is correct
84 Correct 32 ms 1888 KB Output is correct
85 Correct 32 ms 1876 KB Output is correct
86 Correct 86 ms 1876 KB Output is correct
87 Correct 81 ms 1748 KB Output is correct
88 Correct 39 ms 1876 KB Output is correct
89 Correct 78 ms 1876 KB Output is correct
90 Correct 82 ms 1876 KB Output is correct
91 Correct 85 ms 1876 KB Output is correct
92 Correct 83 ms 1748 KB Output is correct
93 Correct 80 ms 1748 KB Output is correct
94 Correct 84 ms 1748 KB Output is correct
95 Correct 86 ms 1808 KB Output is correct
96 Correct 193 ms 13264 KB Output is correct
97 Correct 41 ms 596 KB Output is correct
98 Correct 171 ms 13356 KB Output is correct
99 Correct 93 ms 13356 KB Output is correct
100 Correct 32 ms 596 KB Output is correct
101 Correct 171 ms 13388 KB Output is correct
102 Correct 194 ms 13260 KB Output is correct
103 Correct 193 ms 13332 KB Output is correct
104 Correct 190 ms 13316 KB Output is correct
105 Correct 193 ms 13352 KB Output is correct
106 Correct 194 ms 13344 KB Output is correct
107 Correct 188 ms 13264 KB Output is correct
108 Correct 187 ms 13204 KB Output is correct
109 Correct 188 ms 13324 KB Output is correct